CN205958115U - Temperature compensation circuit is synthesized to triband infrared flame detector infrared tube software and hardware - Google Patents
Temperature compensation circuit is synthesized to triband infrared flame detector infrared tube software and hardware Download PDFInfo
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- CN205958115U CN205958115U CN201620928727.0U CN201620928727U CN205958115U CN 205958115 U CN205958115 U CN 205958115U CN 201620928727 U CN201620928727 U CN 201620928727U CN 205958115 U CN205958115 U CN 205958115U
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- circuit
- temperature
- temperature compensation
- compensation circuit
- operational amplifier
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Abstract
The utility model discloses a temperature compensation circuit is synthesized to triband infrared flame detector infrared tube software and hardware, including MCU, dynamic temperature compensation circuit and static temperature compensation circuit, developments temperature compensation circuit includes amplifier circuit, and amplifier circuit includes operational amplifier U1A, and operational amplifier U1A's inverting input end is connected with compensating circuit, and operational amplifier's output is connected in MCU, static temperature compensation circuit is including being used for gathering the AD sampling circuit of infrared tube output valve, and AD sampling circuit is connected with the multi -stage amplifiers circuit to through multi -stage amplifiers circuit connection in MCU. The utility model provides a not good technical problem of temperature compensating effect who only adopts single temperature compensating (only hardware temperature compensating or the compensation of software algorithm promptly) to cause among the prior art, its circuit structure is simple, temperature compensating is reliable.
Description
Technical field
This utility model belongs to flame detecting field, more particularly, to a kind of temperature-compensating of three wave band infrared flame detectors
Circuit.
Background technology
Single temperature taken by the flame detector being much related to use infrared tube on the market in design to infrared tube
Compensation technique, only does hardware compensating, or is only compensated by software.When variation of ambient temperature especially temperature is higher
When, ambient temperature affects very big on the output signal of infrared tube.It is being related to use the product work of infrared tube in temperature change
Environment in, in the design using single hardware temperatures compensation technique, because conventional NTC thermistor device has non-thread
Property error, therefore good temperature-compensating can not be carried out to infrared tube.Carry out the design of temperature-compensating using single software algorithm
When, accomplish each temperature in certain temperature range is entered due to hardly possible when carrying out temperature test to detector
Row is tested one by one, therefore the data being counted by temperature test is unilateral, and software algorithm has subjectivity.
Utility model content
The purpose of this utility model is：A kind of hardware temperatures of three wave band infrared flame detector infrared tubes are provided to compensate
Circuit, to solve to be made only with single temperature-compensating (i.e. only hardware temperatures compensate or software algorithm compensates) in prior art
The not good technical problem of effect temperature compensation becoming, its circuit structure is simple, and temperature-compensating is reliable.
The technical solution adopted in the utility model is as follows：
A kind of three wave band infrared flame detector infrared tube software and hardware integrated temperature compensation circuits, including MCU, dynamic temperature
Compensation circuit and static temperature compensation circuit；Dynamic temp compensation circuit includes amplifying circuit, and amplifying circuit includes operation amplifier
The inverting input of device U1A, operational amplifier U1A is connected with compensation circuit, and the outfan of operational amplifier is connected to MCU；Quiet
State temperature-compensation circuit includes the AD sample circuit for gathering infrared tube output valve, and AD sample circuit is connected with multistage amplification electricity
Road, and MCU is connected to by multistage amplifier circuit.
Further, compensation circuit includes being connected to the resistance R1 of operational amplifier U1A inverting input, and resistance R1's is another
One end is connected with resistance R2 parallel with one another and NTC thermistor R3, and the low level end of resistance R2 and NTC thermistor R3 connects
There is the electric capacity C2 (for polar capacitor) of ground connection.
Further, the outfan of operational amplifier is connected with protection circuit.
In sum, due to employing technique scheme, the beneficial effects of the utility model are：
The present utility model is overcome by building hardware temperature compensation circuit (i.e. dynamic temp compensation circuit)
There is the technical problem of nonlinearity erron in technology to NTC thermistor device in the hardware compensating of infrared tube, and with static state temperature
Degree compensation circuit combines, and constitutes infrared tube software and hardware integrated temperature compensation circuit, overcomes in prior art only with single
The not good technical problem of effect temperature compensation caused by temperature-compensating (i.e. only hardware temperatures compensate or software algorithm compensates),
Circuit structure of the present utility model is simple, and software compensation is reliable.
Brief description
Fig. 1 is circuit structure block diagram of the present utility model；
Fig. 2 is the schematic diagram of dynamic temp compensation circuit of the present utility model.
Specific embodiment
All features disclosed in this specification, in addition to mutually exclusive feature and/or step, all can be with any
Mode combines.
With reference to Fig. 1～Fig. 2, this utility model is elaborated.
Temperature-compensating of the present utility model includes dynamic temp compensation circuit and static temperature compensation circuit two parts, specifically
, hardware temperature compensation circuit (i.e. dynamic temp compensation circuit) carries out dynamic temp compensation to infrared tube, and software algorithm is (i.e. quiet
State temperature-compensation circuit) static temperature compensation is carried out to infrared tube.
As described below to the hardware temperature compensation circuit of infrared tube：
Including amplifying circuit, compensation circuit and protection circuit, specifically, amplifying circuit includes operational amplifier U1A, computing
The in-phase input end of amplifier U1A is connected with electric capacity C1 and (adopts polar capacitor, that is, the negative pole of polar capacitor is connected to operation amplifier
The in-phase input end of device U1A), (i.e. the positive pole of polar capacitor is as whole hardware temperature compensation circuit for the other end of electric capacity C1
Input) inverting input of operational amplifier U1A is connected with compensation circuit and resistance R4 parallel with one another and electric capacity C3, resistance
The other end of R4 and electric capacity C3 is all connected to the outfan of operational amplifier, and the outfan of operational amplifier is connected with protection electricity
Road.
Compensation circuit includes being connected to the resistance R1 of operational amplifier U1A inverting input, and the other end of resistance R1 connects
There are resistance R2 parallel with one another and NTC thermistor R3, the low level end of resistance R2 and NTC thermistor R3 is connected with ground connection
Electric capacity C2.
Protection circuit includes the resistance R5 being connected to operational amplifier output terminal, and the low level end of resistance R5 is connected with ground connection
Zener diode, specifically, the positive pole of Zener diode is connected with the low level end of resistance R5, Zener diode and resistance R5
Common port as whole hardware temperature compensation circuit outfan (HWV2).
When especially temperature is higher for variation of ambient temperature, ambient temperature is very big on the output signal impact of infrared tube,
Need infrared tube is carried out temperature-compensating when designing three wave band infrared flame detectors, reduce and cause because of ambient temperature change
The impact to detector self performance.Three wave band infrared flame detector infrared tube software and hardware comprehensive compensation techniques are to infrared tube
The compensation that all carries out from hardware and software algorithm of temperature-compensating.
The signal that in circuit, the input of the in-phase end of amplifier gathers for infrared tube, RT2 is NTC thermistor.Work as detector
During the variation of ambient temperature of work, the resistance of RT2 changes with the change of temperature.The change of RT2 resistance, operational amplifier
Amplification also changes therewith.The signal of infrared tube collection is input to microprocessor again after operational amplifier amplification and is sentenced
Not.During signal amplifies, by being amplified the adjustment of multiple with critesistor, the collection signal of infrared tube is carried out
Compensate.RT2 resistance varies with temperature and dynamic change, dynamically adjusts amplification, enters action to the collection signal of infrared tube
The temperature-compensating of state.
Static temperature compensates as described below：
The specially designed temperature collection circuit for software compensation, temperature collection circuit includes AD sample circuit and and AD
The multistage amplifier circuit that sample circuit is connected, and MCU is connected to by multistage amplifier circuit；Worked as by temperature collection circuit collection
The temperature of front infrared tube work local environment, and temperature is transferred to MCU.When carrying out temperature test, in certain temperature range
Set up the output valve of a number of temperature sampling point sampling infrared tube, MCU is collected by AD sample circuit and puts through multistage
The output valve of the infrared tube that big circuit amplifies.The sampled point of AD sample circuit arranges multiple (as red in three wave bands according to practical situation
Outer flame detector is provided with three infrared tubes, and AD sample circuit is all sampled to the outfan of each infrared tube), for each
The output valve of the infrared tube that temperature sampling point collects carries out data analysiss, sets up corresponding mathematical model, by software algorithm
Realize.Temperature-compensating to infrared tube.Tested by a large amount of, find out infrared tube change at various temperatures, by careful
Analysis, to determine their compensation side-play amount, to set up temperature compensation table, implements static compensation with software to ambient temperature, overcomes
Software algorithm subjectivity error during software compensation in prior art.
Claims (3)
1. a kind of three wave band infrared flame detector infrared tube software and hardware integrated temperature compensation circuits are it is characterised in that include
MCU, dynamic temp compensation circuit and static temperature compensation circuit；Dynamic temp compensation circuit includes amplifying circuit, amplifying circuit
Including operational amplifier U1A, the inverting input of operational amplifier U1A is connected with compensation circuit, the outfan of operational amplifier
It is connected to MCU；Static temperature compensation circuit includes the AD sample circuit for gathering infrared tube output valve, and AD sample circuit connects
There is multistage amplifier circuit, and MCU is connected to by multistage amplifier circuit.
2. a kind of three wave band infrared flame detector infrared tube software and hardware integrated temperature compensation circuits as claimed in claim 1,
It is characterized in that, compensation circuit includes being connected to the resistance R1 of operational amplifier U1A inverting input, and the other end of resistance R1 is even
It is connected to resistance R2 parallel with one another and NTC thermistor R3, the low level end of resistance R2 and NTC thermistor R3 is connected with ground connection
Electric capacity C2.
3. a kind of three wave band infrared flame detector infrared tube software and hardware integrated temperature compensation circuits as claimed in claim 1,
It is characterized in that, the outfan of operational amplifier is connected with protection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620928727.0U CN205958115U (en) | 2016-08-24 | 2016-08-24 | Temperature compensation circuit is synthesized to triband infrared flame detector infrared tube software and hardware |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620928727.0U CN205958115U (en) | 2016-08-24 | 2016-08-24 | Temperature compensation circuit is synthesized to triband infrared flame detector infrared tube software and hardware |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205958115U true CN205958115U (en) | 2017-02-15 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620928727.0U Expired - Fee Related CN205958115U (en) | 2016-08-24 | 2016-08-24 | Temperature compensation circuit is synthesized to triband infrared flame detector infrared tube software and hardware |
Country Status (1)
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| CN (1) | CN205958115U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107885078A (en) * | 2017-10-24 | 2018-04-06 | 西安惠迪诺华电子科技股份有限公司 | The adaptive temperature-compensation circuit and method of a kind of ultraviolet infrared detector |
| CN110082836A (en) * | 2019-04-11 | 2019-08-02 | 深圳市领航卫士安全技术有限公司 | A kind of human body recognition method based on infrared sensor, device and equipment |
| CN110132425A (en) * | 2019-06-11 | 2019-08-16 | 中国电子科技集团公司第十三研究所 | Radiometer front end and terminal device |
| CN110208185A (en) * | 2018-08-21 | 2019-09-06 | 华帝股份有限公司 | Detection circuit for detecting smoke concentration by infrared and detection method thereof |
| CN110231096A (en) * | 2019-06-11 | 2019-09-13 | 中国电子科技集团公司第十三研究所 | Radiometer front-end architecture and terminal device |
-
2016
- 2016-08-24 CN CN201620928727.0U patent/CN205958115U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107885078A (en) * | 2017-10-24 | 2018-04-06 | 西安惠迪诺华电子科技股份有限公司 | The adaptive temperature-compensation circuit and method of a kind of ultraviolet infrared detector |
| CN110208185A (en) * | 2018-08-21 | 2019-09-06 | 华帝股份有限公司 | Detection circuit for detecting smoke concentration by infrared and detection method thereof |
| CN110082836A (en) * | 2019-04-11 | 2019-08-02 | 深圳市领航卫士安全技术有限公司 | A kind of human body recognition method based on infrared sensor, device and equipment |
| CN110132425A (en) * | 2019-06-11 | 2019-08-16 | 中国电子科技集团公司第十三研究所 | Radiometer front end and terminal device |
| CN110231096A (en) * | 2019-06-11 | 2019-09-13 | 中国电子科技集团公司第十三研究所 | Radiometer front-end architecture and terminal device |
| CN110132425B (en) * | 2019-06-11 | 2020-09-01 | 中国电子科技集团公司第十三研究所 | Radiometer front end and terminal equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170215 Termination date: 20180824 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |